Electret condenser microphone audio amplifier circuit board module LM386
Description
introduction | LM386 amplifier chip, magnification of 200 times, you can directly drive low-power speakers, for the electret microphone to enlarge |
Practical application | deaf hearing aids: board connected to the microphone, power, headphones is a good effect of deaf hearing aids |
Working voltage | DC 3.7v-12v |
Board size | 25mm * 25mm |